Why does tan 60 degrees equal the square root of 3? if i use a calculator to calculate i get 1.7 but how would i guess square root of 3?

Which math sentence can be used to determine if the triangle is a right triangle?

The polynomial 10x3 + 35x2 - 4x - 14 is factored by grouping. 10x3 + 35x2 - 4x - 14 5x )-20 what is the common factor that is missing from both sets of parentheses?

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.